---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/api/errors/80502#article
headline: "80502: Internal Server Error from Downstream"
url: https://www.twilio.com/docs/api/errors/80502
inLanguage: en
dateModified: 2026-06-08T12:04:59.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# 80502: Internal Server Error from Downstream

Log Level: ERROR

## Description

Twilio returns this error when Proxy sends a request to a downstream service and that service fails or refuses to process it. Review the matching Debugger event to confirm which Proxy request failed and whether related notifications provide more detail.

### Possible causes

* A downstream service returned an internal server error while Proxy was processing your request.
* A downstream service refused the request that Proxy sent on your behalf.
* The root cause was emitted by a related downstream system and is only visible in associated Debugger events.

### Possible solutions

* Open the Twilio Console Debugger and review the 80502 event, including the Log Properties and any related notifications for the same request.
* Identify which Proxy operation failed, such as a request involving a Service, Session, Participant, or Interaction resource, then retry only after you have confirmed the failure details.
* If the error continues, capture the `Twilio-Request-Id` response header, note the timestamp and affected resource SID, and contact Twilio Support.
* If your application retries failed API requests, use exponential backoff to avoid adding more load while you investigate.

#### Additional resources

* [Proxy API overview](/docs/proxy/api)
* [Twilio Debugger](/docs/usage/troubleshooting/debugging-your-application)
* [API best practices](/docs/usage/rest-api-best-practices)